Merge branch 'master' of https://github.com/kebekus/srt
Merge branch 'master' of https://github.com/kebekus/srt
Merge branch 'master' of https://github.com/xdsopl/srt
Merge branch 'master' of https://github.com/kebekus/srt
Fade in/out for coordinate axis while mouse manipulation
Add coordinate axes as openGL overlay in the SceneWidget
Merge branch 'master' of https://github.com/xdsopl/srt
Fix 3d shading of arrow tips
openGL finetuning
Update tests